Insider trading activities (stock purchases, sales, and option exercises)
reported by insiders of Mersana Therapeutics, Inc. (MRSN)
since 2017 are shown in Table 1 and Table 2.
Table 1 shows the monthly insider trading data of Mersana Therapeutics, Inc..
Table 2 shows the detailed insider transactions.
This company's CIK number is 1442836.
Total stock buying since 2017: $228,726,685.
Total stock sales since 2017: $4,739,986.
Total stock option exercises since 2017: $694,872.
Table 3. Detailed insider trading at Mersana Therapeutics, Inc. (MRSN)
| Trade Date |
Insider Name |
Trade Type |
Shares |
Price ($) |
Value ($) |
| 2025-01-16 | Bala Mohan (SVP, Chief Development Officer) | Sale | 5,939 | .58 | 3,444 |
| 2025-01-16 | Mandelia Ashish (VP, Chief Accounting Officer) | Sale | 3,554 | .58 | 2,061 |
| 2025-01-16 | Deschuytner Brian (SVP, COO & CFO) | Sale | 8,470 | .58 | 4,912 |
| 2025-01-16 | Lowinger Timothy B (SVP, Chief Sci.&Tech. Officer) | Sale | 8,048 | .58 | 4,667 |
| 2025-01-16 | Huber Martin H. Jr. (President, CEO) | Sale | 4,514 | .58 | 2,618 |
| 2025-01-16 | Carvajal Alejandra (SVP, Chief Legal Officer) | Sale | 5,096 | .58 | 2,955 |
| 2025-01-16 | Protopapas Anna | Sale | 8,637 | .58 | 5,009 |
| 2025-01-15 | Bala Mohan (SVP, Chief Development Officer) | Option Ex | 14,583 | .00 | 0 |
| 2025-01-15 | Mandelia Ashish (VP, Chief Accounting Officer) | Sale | 1,791 | .63 | 1,128 |
| 2025-01-15 | Mandelia Ashish (VP, Chief Accounting Officer) | Option Ex | 8,685 | .00 | 0 |
| 2025-01-15 | Deschuytner Brian (SVP, COO & CFO) | Sale | 2,331 | .63 | 1,468 |
| 2025-01-15 | Deschuytner Brian (SVP, COO & CFO) | Option Ex | 20,833 | .00 | 0 |
| 2025-01-15 | Lowinger Timothy B (SVP, Chief Sci.&Tech. Officer) | Sale | 1,794 | .63 | 1,130 |
| 2025-01-15 | Lowinger Timothy B (SVP, Chief Sci.&Tech. Officer) | Option Ex | 19,791 | .00 | 0 |
| 2025-01-15 | Huber Martin H. Jr. (President, CEO) | Option Ex | 11,062 | .00 | 0 |
| 2025-01-15 | Carvajal Alejandra (SVP, Chief Legal Officer) | Sale | 952 | .63 | 599 |
| 2025-01-15 | Carvajal Alejandra (SVP, Chief Legal Officer) | Option Ex | 12,500 | .00 | 0 |
| 2025-01-15 | Protopapas Anna | Sale | 6,191 | .63 | 3,900 |
| 2025-01-15 | Protopapas Anna | Option Ex | 21,250 | .00 | 0 |
| 2025-01-14 | Bala Mohan (SVP, Chief Development Officer) | Sale | 3,253 | .66 | 2,146 |
| 2025-01-14 | Mandelia Ashish (VP, Chief Accounting Officer) | Sale | 1,007 | .66 | 664 |
| 2025-01-14 | Mandelia Ashish (VP, Chief Accounting Officer) | Option Ex | 4,783 | .00 | 0 |
| 2025-01-14 | Deschuytner Brian (SVP, COO & CFO) | Sale | 3,713 | .66 | 2,450 |
| 2025-01-14 | Deschuytner Brian (SVP, COO & CFO) | Option Ex | 6,250 | .00 | 0 |
| 2025-01-14 | Lowinger Timothy B (SVP, Chief Sci.&Tech. Officer) | Sale | 3,483 | .66 | 2,298 |
| 2025-01-14 | Lowinger Timothy B (SVP, Chief Sci.&Tech. Officer) | Option Ex | 4,792 | .00 | 0 |
| 2025-01-14 | Carvajal Alejandra (SVP, Chief Legal Officer) | Sale | 3,330 | .66 | 2,197 |
| 2025-01-14 | Carvajal Alejandra (SVP, Chief Legal Officer) | Option Ex | 2,500 | .00 | 0 |
| 2025-01-14 | Protopapas Anna | Sale | 11,534 | .66 | 7,612 |
| 2025-01-14 | Protopapas Anna | Option Ex | 16,750 | .00 | 0 |
| 2025-01-13 | Bala Mohan (SVP, Chief Development Officer) | Option Ex | 8,750 | .00 | 0 |
| 2025-01-13 | Mandelia Ashish (VP, Chief Accounting Officer) | Option Ex | 2,646 | .00 | 0 |
| 2025-01-13 | Deschuytner Brian (SVP, COO & CFO) | Option Ex | 10,000 | .00 | 0 |
| 2025-01-13 | Lowinger Timothy B (SVP, Chief Sci.&Tech. Officer) | Option Ex | 9,375 | .00 | 0 |
| 2025-01-13 | Carvajal Alejandra (SVP, Chief Legal Officer) | Option Ex | 8,958 | .00 | 0 |
| 2025-01-13 | Protopapas Anna | Option Ex | 31,250 | .00 | 0 |
| 2024-10-28 | Bala Mohan (SVP, Chief Development Officer) | Sale | 1,884 | 1.90 | 3,579 |
| 2024-10-25 | Bala Mohan (SVP, Chief Development Officer) | Option Ex | 6,250 | .00 | 0 |
| 2024-10-03 | Bala Mohan (SVP, Chief Development Officer) | Sale | 5,598 | 1.96 | 10,972 |
| 2024-10-03 | Mandelia Ashish (VP, Chief Accounting Officer) | Sale | 3,361 | 1.96 | 6,587 |
| 2024-10-03 | Deschuytner Brian (SVP, COO & CFO) | Sale | 5,598 | 1.96 | 10,972 |
| 2024-10-03 | Lowinger Timothy B (SVP, Chief Sci.&Tech. Officer) | Sale | 5,598 | 1.96 | 10,972 |
| 2024-10-03 | Carvajal Alejandra (SVP, Chief Legal Officer) | Sale | 5,598 | 1.96 | 10,972 |
| 2024-10-02 | Bala Mohan (SVP, Chief Development Officer) | Sale | 8,089 | 2.00 | 16,178 |
| 2024-10-02 | Mandelia Ashish (VP, Chief Accounting Officer) | Sale | 4,855 | 2.00 | 9,710 |
| 2024-10-02 | Deschuytner Brian (SVP, COO & CFO) | Sale | 8,089 | 2.00 | 16,178 |
| 2024-10-02 | Lowinger Timothy B (SVP, Chief Sci.&Tech. Officer) | Sale | 8,089 | 2.00 | 16,178 |
| 2024-10-02 | Carvajal Alejandra (SVP, Chief Legal Officer) | Sale | 8,089 | 2.00 | 16,178 |
| 2024-10-01 | Bala Mohan (SVP, Chief Development Officer) | Option Ex | 50,000 | .00 | 0 |
| 2024-10-01 | Mandelia Ashish (VP, Chief Accounting Officer) | Option Ex | 30,000 | .00 | 0 |
| 2024-10-01 | Deschuytner Brian (SVP, COO & CFO) | Option Ex | 50,000 | .00 | 0 |
| 2024-10-01 | Lowinger Timothy B (SVP, Chief Sci.&Tech. Officer) | Option Ex | 50,000 | .00 | 0 |
| 2024-10-01 | Carvajal Alejandra (SVP, Chief Legal Officer) | Option Ex | 50,000 | .00 | 0 |
| 2024-09-12 | Huber Martin H. Jr. (President, CEO) | Sale | 50,423 | 1.76 | 88,744 |
| 2024-09-11 | Huber Martin H. Jr. (President, CEO) | Option Ex | 166,750 | .00 | 0 |
| 2024-01-16 | Bala Mohan (SVP, Chief Development Officer) | Sale | 3,431 | 2.71 | 9,298 |
| 2024-01-16 | Misra Tushar (SVP, Chief Manuf. Officer) | Sale | 3,357 | 2.71 | 9,097 |
| 2024-01-16 | Mandelia Ashish (VP, Chief Accounting Officer) | Sale | 5,025 | 2.71 | 13,617 |
| 2024-01-16 | Deschuytner Brian (SVP, COO & CFO) | Sale | 9,327 | 2.71 | 25,276 |
| 2024-01-16 | Lowinger Timothy B (SVP, Chief Sci.&Tech. Officer) | Sale | 10,409 | 2.71 | 28,208 |
| 2024-01-16 | Carvajal Alejandra (SVP, Chief Legal Officer) | Sale | 4,381 | 2.71 | 11,872 |
| 2024-01-16 | Protopapas Anna | Sale | 29,399 | 2.71 | 79,671 |
| 2024-01-15 | Mandelia Ashish (VP, Chief Accounting Officer) | Option Ex | 5,352 | .00 | 0 |
| 2024-01-15 | Deschuytner Brian (SVP, COO & CFO) | Option Ex | 10,208 | .00 | 0 |
| 2024-01-15 | Lowinger Timothy B (SVP, Chief Sci.&Tech. Officer) | Option Ex | 15,208 | .00 | 0 |
| 2024-01-15 | Protopapas Anna | Option Ex | 38,958 | .00 | 0 |
| 2024-01-14 | Misra Tushar (SVP, Chief Manuf. Officer) | Option Ex | 1,458 | .00 | 0 |
| 2024-01-14 | Mandelia Ashish (VP, Chief Accounting Officer) | Option Ex | 4,783 | .00 | 0 |
| 2024-01-14 | Deschuytner Brian (SVP, COO & CFO) | Option Ex | 6,250 | .00 | 0 |
| 2024-01-14 | Lowinger Timothy B (SVP, Chief Sci.&Tech. Officer) | Option Ex | 4,792 | .00 | 0 |
| 2024-01-14 | Carvajal Alejandra (SVP, Chief Legal Officer) | Option Ex | 2,500 | .00 | 0 |
| 2024-01-14 | Protopapas Anna | Option Ex | 16,750 | .00 | 0 |
| 2024-01-13 | Bala Mohan (SVP, Chief Development Officer) | Option Ex | 8,750 | .00 | 0 |
| 2024-01-13 | Misra Tushar (SVP, Chief Manuf. Officer) | Option Ex | 7,083 | .00 | 0 |
| 2024-01-13 | Mandelia Ashish (VP, Chief Accounting Officer) | Option Ex | 2,645 | .00 | 0 |
| 2024-01-13 | Deschuytner Brian (SVP, COO & CFO) | Option Ex | 10,000 | .00 | 0 |
| 2024-01-13 | Lowinger Timothy B (SVP, Chief Sci.&Tech. Officer) | Option Ex | 9,375 | .00 | 0 |
| 2024-01-13 | Carvajal Alejandra (SVP, Chief Legal Officer) | Option Ex | 8,958 | .00 | 0 |
| 2024-01-13 | Protopapas Anna | Option Ex | 31,250 | .00 | 0 |
| 2023-10-26 | Bala Mohan (SVP, Chief Development Officer) | Sale | 1,912 | 1.13 | 2,160 |
| 2023-10-25 | Bala Mohan (SVP, Chief Development Officer) | Option Ex | 6,250 | .00 | 0 |
| 2023-08-17 | Misra Tushar (SVP, Chief Manuf. Officer) | Sale | 1,908 | 1.18 | 2,251 |
| 2023-08-16 | Misra Tushar (SVP, Chief Manuf. Officer) | Option Ex | 6,250 | .00 | 0 |
| 2023-04-27 | Carvajal Alejandra (SVP, Chief Legal Officer) | Sale | 3,944 | 3.89 | 15,342 |
| 2023-04-26 | Carvajal Alejandra (SVP, Chief Legal Officer) | Option Ex | 13,250 | .00 | 0 |
| 2023-01-17 | Misra Tushar (SVP, CMO) | Sale | 458 | 5.74 | 2,628 |
| 2023-01-17 | Yang Arvin (SVP, Chief Medical Officer) | Sale | 2,209 | 5.74 | 12,679 |
| 2023-01-17 | Mandelia Ashish (VP, Controller) | Sale | 3,575 | 5.74 | 20,520 |
| 2023-01-17 | Deschuytner Brian (SVP, Chief Financial Officer) | Sale | 5,131 | 5.74 | 29,451 |
| 2023-01-17 | Lowinger Timothy B (SVP, Chief Sci.&Tech. Off.) | Sale | 6,233 | 5.74 | 35,777 |
| 2023-01-17 | Carvajal Alejandra (SVP, Chief Legal Officer) | Sale | 782 | 5.74 | 4,488 |
| 2023-01-17 | Protopapas Anna (President & CEO) | Sale | 17,346 | 5.74 | 99,566 |
| 2023-01-15 | Mandelia Ashish (VP, Controller) | Option Ex | 5,352 | .00 | 0 |
| 2023-01-15 | Deschuytner Brian (SVP, Chief Financial Officer) | Option Ex | 10,208 | .00 | 0 |
| 2023-01-15 | Lowinger Timothy B (SVP, Chief Sci.&Tech. Off.) | Option Ex | 15,209 | .00 | 0 |
| 2023-01-15 | Protopapas Anna (President & CEO) | Option Ex | 38,958 | .00 | 0 |
| 2023-01-14 | Misra Tushar (SVP, CMO) | Option Ex | 1,459 | .00 | 0 |
| 2023-01-14 | Yang Arvin (SVP, Chief Medical Officer) | Option Ex | 7,084 | .00 | 0 |
| 2023-01-14 | Mandelia Ashish (VP, Controller) | Option Ex | 4,784 | .00 | 0 |
| 2023-01-14 | Deschuytner Brian (SVP, Chief Financial Officer) | Option Ex | 6,250 | .00 | 0 |
| 2023-01-14 | Lowinger Timothy B (SVP, Chief Sci.&Tech. Off.) | Option Ex | 4,792 | .00 | 0 |
| 2023-01-14 | Carvajal Alejandra (SVP, Chief Legal Officer) | Option Ex | 2,500 | .00 | 0 |
| 2023-01-14 | Protopapas Anna (President & CEO) | Option Ex | 16,750 | .00 | 0 |
| 2022-12-01 | Yang Arvin (Chief Medical Officer) | Sale | 5,527 | 6.59 | 36,422 |
| 2022-11-30 | Yang Arvin (Chief Medical Officer) | Option Ex | 18,500 | .00 | 0 |
| 2022-08-17 | Misra Tushar (Chief Manufacturing Officer) | Sale | 1,879 | 7.10 | 13,340 |
| 2022-08-16 | Misra Tushar (Chief Manufacturing Officer) | Option Ex | 6,250 | .00 | 0 |
| 2022-06-02 | Hack Andrew A. F. (Director) | Buy | 14,760 | 3.20 | 47,187 |
| 2022-05-31 | Hack Andrew A. F. (Director) | Buy | 80,759 | 3.28 | 264,808 |
| 2022-05-26 | Hack Andrew A. F. (Director) | Buy | 75,000 | 3.19 | 238,950 |
| 2022-05-25 | Hack Andrew A. F. (Director) | Buy | 90,155 | 3.17 | 286,242 |
| 2022-05-24 | Hack Andrew A. F. (Director) | Buy | 100,000 | 3.29 | 329,000 |
| 2022-05-23 | Hack Andrew A. F. (Director) | Buy | 15,599 | 3.35 | 52,241 |
| 2022-05-20 | Hack Andrew A. F. (Director) | Buy | 100,000 | 3.46 | 345,600 |
| 2022-05-19 | Hack Andrew A. F. (Director) | Buy | 100,000 | 3.49 | 348,600 |
| 2022-05-18 | Hack Andrew A. F. (Director) | Buy | 211,268 | 3.35 | 707,325 |
| 2022-05-17 | Hack Andrew A. F. (Director) | Buy | 3,440 | 3.18 | 10,952 |
| 2022-05-16 | Hack Andrew A. F. (Director) | Buy | 135,292 | 3.10 | 419,405 |
| 2022-04-26 | Carvajal Alejandra (Chief Legal Officer) | Sale | 3,948 | 3.69 | 14,568 |
| 2022-04-26 | Carvajal Alejandra (Chief Legal Officer) | Option Ex | 13,250 | .00 | 0 |
| 2022-04-13 | Hack Andrew A. F. (Director) | Buy | 617,284 | 4.05 | 2,500,000 |
| 2022-04-12 | Hack Andrew A. F. (Director) | Buy | 598,086 | 4.18 | 2,499,999 |
| 2022-02-07 | Hack Andrew A. F. (Director) | Buy | 1,136,363 | 4.42 | 5,022,724 |
| 2022-01-18 | Mandelia Ashish (VP, Controller) | Sale | 1,982 | 5.92 | 11,733 |
| 2022-01-18 | Lowinger Timothy B (Chief Science & Tech Off.) | Sale | 4,741 | 5.92 | 28,066 |
| 2022-01-14 | Mandelia Ashish (VP, Controller) | Option Ex | 5,353 | .00 | 0 |
| 2022-01-14 | Deschuytner Brian (Chief Financial Officer) | Option Ex | 10,208 | .00 | 0 |
| 2022-01-14 | Lowinger Timothy B (Chief Science & Tech Off.) | Option Ex | 15,209 | .00 | 0 |
| 2022-01-14 | Protopapas Anna (President & CEO) | Option Ex | 38,958 | .00 | 0 |
| 2021-12-29 | Hack Andrew A. F. (Director) | Buy | 875,000 | 5.75 | 5,031,250 |
| 2021-12-20 | Lowinger Timothy B (Chief Science & Tech. Officer) | Option Ex | 45,593 | 1.40 | 63,830 |
| 2021-12-01 | Yang Arvin (Chief Medical Officer) | Sale | 5,527 | 6.81 | 37,638 |
| 2021-11-30 | Yang Arvin (Chief Medical Officer) | Option Ex | 18,500 | .00 | 0 |
| 2021-08-20 | Lowinger Timothy B (Chief Science & Tech. Officer) | Sale | 2,216 | 11.01 | 24,398 |
| 2021-08-20 | Lowinger Timothy B (Chief Science & Tech. Officer) | Option Ex | 2,216 | 6.16 | 13,650 |
| 2021-07-20 | Lowinger Timothy B (Chief Science & Tech. Officer) | Sale | 2,227 | 12.11 | 26,968 |
| 2021-07-20 | Lowinger Timothy B (Chief Science & Tech. Officer) | Option Ex | 2,227 | 6.16 | 13,718 |
| 2021-07-19 | Kaufman Michael J. (Chief Manufacturing Officer) | Sale | 6,312 | 12.02 | 75,870 |
| 2021-07-19 | Lowinger Timothy B (Chief Science & Tech. Officer) | Sale | 8,496 | 12.02 | 102,121 |
| 2021-07-19 | Protopapas Anna (President & CEO) | Sale | 21,901 | 12.02 | 263,250 |
| 2021-07-16 | Kaufman Michael J. (Chief Manufacturing Officer) | Sale | 5,776 | 12.47 | 72,026 |
| 2021-07-16 | Lowinger Timothy B (Chief Science & Tech. Officer) | Sale | 7,775 | 12.47 | 96,954 |
| 2021-07-16 | Protopapas Anna (President & CEO) | Sale | 20,043 | 12.47 | 249,936 |
| 2021-07-15 | Kaufman Michael J. (Chief Manufacturing Officer) | Option Ex | 40,000 | .00 | 0 |
| 2021-07-15 | Lowinger Timothy B (Chief Science & Tech. Officer) | Option Ex | 40,000 | .00 | 0 |
| 2021-07-15 | Protopapas Anna (President & CEO) | Option Ex | 100,000 | .00 | 0 |
| 2021-07-08 | Lowinger Timothy B (CS & Technology Officer) | Option Ex | 20,000 | 1.40 | 28,000 |
| 2021-07-01 | Mandelia Ashish (VP, Controller) | Sale | 942 | 13.60 | 12,811 |
| 2021-07-01 | Lowinger Timothy B (CS & Technology Officer) | Sale | 1,886 | 13.60 | 25,649 |
| 2021-07-01 | Lowinger Timothy B (CS & Technology Officer) | Option Ex | 1,886 | 4.83 | 9,118 |
| 2021-06-21 | Lowinger Timothy B (Chief Science & Tech. Officer) | Sale | 2,220 | 13.78 | 30,591 |
| 2021-06-21 | Lowinger Timothy B (Chief Science & Tech. Officer) | Option Ex | 2,220 | 4.83 | 10,733 |
| 2021-06-01 | Alleva Lawrence M | Buy | 1,035 | 14.38 | 14,883 |
| 2021-04-20 | Lowinger Timothy B (Chief Science & Tech. Officer) | Sale | 4,102 | 15.91 | 65,262 |
| 2021-04-20 | Lowinger Timothy B (Chief Science & Tech. Officer) | Option Ex | 4,102 | 4.83 | 19,833 |
| 2021-03-22 | Lowinger Timothy B (Chief Science & Tech. Officer) | Sale | 8,203 | 17.50 | 143,552 |
| 2021-03-22 | Lowinger Timothy B (Chief Science & Tech. Officer) | Option Ex | 8,203 | 4.83 | 39,661 |
| 2021-02-22 | Lowinger Timothy B (Chief Science & Tech. Officer) | Sale | 8,203 | 20.01 | 164,142 |
| 2021-02-22 | Lowinger Timothy B (Chief Science & Tech. Officer) | Option Ex | 8,203 | 4.83 | 39,661 |
| 2021-01-20 | Lowinger Timothy B (Chief Science & Tech. Officer) | Sale | 8,203 | 21.54 | 176,692 |
| 2021-01-20 | Lowinger Timothy B (Chief Science & Tech. Officer) | Option Ex | 8,203 | 4.83 | 39,661 |
| 2021-01-19 | Mandelia Ashish (VP, Controller) | Sale | 545 | 21.28 | 11,597 |
| 2021-01-15 | Mandelia Ashish (VP, Controller) | Option Ex | 834 | .00 | 0 |
| 2021-01-15 | Deschuytner Brian (Sr. VP., FIN, Product Strategy) | Option Ex | 3,959 | .00 | 0 |
| 2021-01-15 | Kaufman Michael J. (Sr VP, Chemistry, Man.&Control) | Option Ex | 6,667 | .00 | 0 |
| 2021-01-15 | Lowinger Timothy B (Chief Science & Tech. Officer) | Option Ex | 7,917 | .00 | 0 |
| 2021-01-15 | Protopapas Anna (President & CEO) | Option Ex | 17,709 | .00 | 0 |
| 2021-01-12 | Hack Andrew A. F. (Director) | Buy | 75,000 | 18.16 | 1,362,000 |
| 2021-01-11 | Hack Andrew A. F. (Director) | Buy | 75,000 | 18.52 | 1,389,000 |
| 2021-01-08 | Hack Andrew A. F. (Director) | Buy | 100,000 | 18.39 | 1,839,000 |
| 2021-01-04 | Mandelia Ashish (VP, Controller) | Sale | 247 | 26.76 | 6,609 |
| 2020-12-28 | Lowinger Timothy B (Chief Science & Tech. Officer) | Option Ex | 9,000 | 1.40 | 12,600 |
| 2020-12-21 | Lowinger Timothy B (Chief Science & Tech. Officer) | Sale | 8,203 | 25.59 | 209,955 |
| 2020-12-21 | Lowinger Timothy B (Chief Science & Tech. Officer) | Option Ex | 8,203 | 4.83 | 39,661 |
| 2020-10-21 | Lowinger Timothy B (Chief Science & Tech. Officer) | Sale | 4,101 | 17.50 | 71,767 |
| 2020-10-21 | Lowinger Timothy B (Chief Science & Tech. Officer) | Option Ex | 4,101 | 4.83 | 19,828 |
| 2020-10-20 | Lowinger Timothy B (Chief Science & Tech. Officer) | Sale | 4,102 | 16.74 | 68,667 |
| 2020-10-20 | Lowinger Timothy B (Chief Science & Tech. Officer) | Option Ex | 20,953 | 4.62 | 96,907 |
| 2020-09-21 | Lowinger Timothy B (Chief Science, Tech. Officer) | Sale | 20,614 | 20.66 | 425,823 |
| 2020-09-21 | Lowinger Timothy B (Chief Science, Tech. Officer) | Option Ex | 8,203 | 4.83 | 39,661 |
| 2020-09-14 | Jack Eva M. (Chief Bus. Officer, Tres, Sec.) | Sale | 35,248 | 22.00 | 775,456 |
| 2020-09-14 | Jack Eva M. (Chief Bus. Officer, Tres, Sec.) | Option Ex | 35,248 | 1.53 | 53,929 |
| 2020-07-02 | Mandelia Ashish (VP, Controller) | Sale | 3,383 | 22.49 | 76,083 |
| 2020-06-30 | Mandelia Ashish (VP, Controller) | Buy | 3,383 | 4.87 | 16,475 |
| 2020-06-01 | Alleva Lawrence M (Director) | Buy | 1,085 | 22.95 | 24,906 |
| 2020-04-14 | Sandell Scott D (10% Owner) | Sale | 548 | 9.22 | 5,052 |
| 2020-04-13 | Florence Anthony A. Jr. (10% Owner) | Sale | 20,914 | 8.50 | 177,769 |
| 2020-04-13 | Baskett Forest (10% Owner) | Sale | 24,104 | 8.54 | 205,126 |
| 2020-04-13 | Sandell Scott D (10% Owner) | Sale | 22,564 | 8.74 | 192,581 |
| 2020-04-07 | Hack Andrew A. F. (Director) | Buy | 3,445,667 | 6.67 | 22,965,370 |
| 2020-04-07 | Mott David M (Director) | Buy | 538,599 | 5.59 | 3,010,768 |
| 2019-08-28 | Sandell Scott D (10% Owner) | Sale | 1,211 | 2.91 | 3,524 |
| 2019-03-05 | Sandell Scott D (10% Owner) | Buy | 3,750,000 | 4.00 | 15,000,000 |
| 2019-03-05 | Mott David M (Director) | Buy | 3,750,000 | 4.00 | 15,000,000 |
| 2018-09-24 | Lowinger Timothy B (Chief Scientific Officer) | Sale | 3,500 | 11.63 | 40,705 |
| 2018-09-24 | Lowinger Timothy B (Chief Scientific Officer) | Option Ex | 3,500 | 1.40 | 4,900 |
| 2018-08-27 | Lowinger Timothy B (Chief Scientific Officer) | Sale | 3,500 | 13.15 | 46,025 |
| 2018-08-27 | Lowinger Timothy B (Chief Scientific Officer) | Option Ex | 3,500 | 7.43 | 26,005 |
| 2018-07-23 | Lowinger Timothy B (Chief Scientific Officer) | Sale | 3,500 | 11.06 | 38,710 |
| 2018-07-03 | Lowinger Timothy B (Chief Scientific Officer) | Option Ex | 10,000 | 1.40 | 14,000 |
| 2018-02-21 | Lowinger Timothy B (Chief Scientific Officer) | Option Ex | 5,911 | 6.98 | 41,258 |
| 2018-01-30 | Foster Wayne (Vice President of Finance) | Option Ex | 14,705 | 3.56 | 52,320 |
| 2017-12-20 | Protopapas Anna (President and CEO) | Option Ex | 10,417 | 1.53 | 15,938 |
| 2017-07-03 | Florence Anthony A. Jr. (10% Owner) | Buy | 1,000,000 | 15.00 | 15,000,000 |
| 2017-07-03 | Sonsini Peter W. (10% Owner) | Buy | 1,000,000 | 15.00 | 15,000,000 |
| 2017-07-03 | Nea 14 Gp, Ltd (10% Owner) | Buy | 1,000,000 | 15.00 | 15,000,000 |
| 2017-07-03 | Viswanathan Ravi (10% Owner) | Buy | 1,000,000 | 15.00 | 15,000,000 |
| 2017-07-03 | Baskett Forest (10% Owner) | Buy | 1,000,000 | 15.00 | 15,000,000 |
| 2017-07-03 | Sandell Scott D (10% Owner) | Buy | 1,000,000 | 15.00 | 15,000,000 |
| 2017-07-03 | Kerins Patrick J (10% Owner) | Buy | 1,000,000 | 15.00 | 15,000,000 |
| 2017-07-03 | Mott David M (Director) | Buy | 1,000,000 | 15.00 | 15,000,000 |
| 2017-07-03 | Barrett M James (10% Owner) | Buy | 1,000,000 | 15.00 | 15,000,000 |
| 2017-07-03 | Barris Peter J (10% Owner) | Buy | 1,000,000 | 15.00 | 15,000,000 |
Insider trading activities including stock purchases, stock sales, and option exercises
of MRSN listed in the above tables cannot be completely guaranteed as to their accuracy.
For more insider trading information of Mersana Therapeutics, Inc. (symbol MRSN,
CIK number 1442836) see
the Securities and Exchange Commission (SEC) website.